Hello,
When I try and jog using lightburn my machine always moves 4 times the amount, kinda crazy! If I type in lightburn to jog 50mm and press move…it moves 200mm. It doesn’t mater what dimension it is, always 4 times the amount…its driving me nuts!
Is this a new device? Or this is an existing device and this is a new behavior?
Confirm that this is for the C3D board listed on your profile.
This is an existing laser cutter. All I did was update my old M2 nano board to a new C3D board with external steppers. This only happens when using the new board.
This is most like an axis calibration issue.
There are potentially a couple of things at play:
- Stepper driver configuration. Apparently C3D recommends 1/16 microstepping. Is this how you have it configured? Check here for more information:
LaserBoard Connecting External Stepper Drivers - Cohesion3D - Post stepper driver configuration, you need to calibrate the steps per mm and set it in your config.txt file. Check step #6 in C3D Configuration Adjustment Guide:
Configuration Adjustment Guide - Cohesion3D
If your stepper driver was configured for 1/4 microstepping that could account for the entire difference. Or it could just be the steps/mm were never set for your laser.
Ok after a couple of days of not being able to try this I finally got home, I adjusted the steps per mm in the config file and it worked out great!. Thank you berainlb!!..Now for another issue which I totally understand is a config file setting somewhere. When I go and try to do a test cut / engrave anywhere on my bed regardless of speed my stepper motors let out a crazy loud screeching noise! If someone can shoot me in the right direction of where to look in the config file for adjustments that would be great. The motors don’t get hot and I’m pretty darn certain that its not from like metal on metal scrapping / screeching.
Thanks
Sounds like the motors are skipping steps. This can be from a few things:
- Your acceleration is set too high for your driver and motor combination. Check Step 7 in the C3D Configuration Adjustment Guide.
- Your stepper driver is not configured for the correct current for your motor. For your external stepper drivers this is configured on the driver itself. Make sure this is correct for your motors.
I have adjusted a few things like your suggestions and it seems to be getting better. A few more tweek’s here and there and I believe I should be up and running.
Thank you
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